Intel Core i7-3930K

The Intel Core i7-3930K is a six-core, twelve-thread desktop processor built on Intel's 32nm Sandy Bridge-E architecture. It runs at a base clock of 3.20 GHz and a boost clock of 3.80 GHz, with a 130W TDP and an unlocked multiplier. Released in November 2011 on the LGA 2011 socket, it supports quad-channel DDR3 memory and 40 PCIe Gen 3 lanes from the CPU. With a launch MSRP of $583, it now sits at the 46th percentile of all CPUs in the database, holding an average benchmark score of 1963. The following sections break down its performance, thermals, and suitability for modern workloads.

Benchmark Performance

The i7-3930K's multi-threaded results remain respectable for a part of its era. In Cinebench R23, it scores 6973 multi-core and 984 single-core. The R20 run yields 2928 multi-core and 413 single-core, while R15 produces 702 and 99 respectively. Geekbench shows 2991 multi-core and 617 single-core. These numbers place the chip near the middle of the database: its 46th percentile means slightly more than half of all recorded CPUs outperform it. The average benchmark score of 1963 is almost identical to that of its nearest rivals. The Intel Xeon D-2712T averages 1964, a 0% delta; the Xeon E3-1230 v5 scores 1965, a -0.1% delta; the AMD Ryzen 5 2600H averages 1967, a -0.2% delta; and the AMD Ryzen 3 2300X averages 1968, a -0.3% delta. In practical terms, the 3930K is within 0.3% of all four rivals, meaning its overall performance is statistically indistinguishable from those parts in average benchmark terms. However, that parity is driven almost entirely by multi-threaded workloads. The single-core scores are far lower than modern mainstream chips, but the multi-core scores benefit from the 12 threads. The R23 multi-thread score of 6973 is roughly 7.1 times the single-thread score of 984, indicating strong scaling across the six physical cores and twelve logical threads. The R20 and R15 ratios are similar (7.1x and 7.1x), confirming consistent thread utilization. For a 2011 processor, this level of multi-threaded throughput is still competitive with entry-level modern parts, but the single-thread performance drags the overall average down.

Power and Thermals

The i7-3930K carries a 130W TDP, which places it in the high-power class of desktop CPUs. This is a direct consequence of its six cores, 12 threads, and 32nm process node. The die measures 435 mm² and contains 2,270 million transistors, a large chip that generates substantial heat under load. The 130W rating demands a capable cooling solution: a high-end air cooler or a substantial liquid cooler is necessary to keep temperatures in check, especially when the unlocked multiplier is used to push clocks beyond the 3.80 GHz boost. The 32nm process is not particularly efficient by modern standards, so the 130W TDP likely translates to real-world power draw near or above that figure during sustained all-core workloads. For builders, this means case airflow and cooler mounting are critical. The lack of integrated graphics also means a discrete GPU is mandatory, adding another heat source inside the chassis. While the 130W TDP is not extreme by today's standards, it is high enough that a stock Intel cooler would be inadequate; aftermarket cooling is a requirement, not an option.

Who Should Consider It

Given its benchmark profile, the i7-3930K is not a sensible choice for modern gaming builds. The single-core Cinebench R23 score of 984 is far below what contemporary games expect, and the 46th percentile overall ranking confirms that most current CPUs will outperform it in lightly threaded tasks. For high-refresh-rate gaming or esports titles that rely on strong single-thread performance, this chip will be a bottleneck. However, for multi-threaded productivity workloads, the picture is different. The R23 multi-core score of 6973 and Geekbench multi-core score of 2991 indicate that the 3930K can still handle video encoding, 3D rendering, batch photo processing, and similar tasks that scale across many threads. Its quad-channel DDR3 memory support, with a theoretical bandwidth of 51.2 GB/s, further aids memory-intensive applications. The 40 PCIe Gen 3 lanes from the CPU allow multiple GPUs or high-speed NVMe adapters without a chipset bottleneck, which is a feature rarely found in modern consumer platforms. That makes the 3930K a viable option for someone building a budget workstation around an older LGA 2011 board, provided they can accept the single-thread limitations and the need for a discrete GPU. It is also worth noting that the chip is end-of-life, so any purchase would be used or refurbished; the absence of ECC memory support rules out mission-critical server roles.

FAQ

Q: What socket does the Intel Core i7-3930K use?

A: It uses Intel Socket 2011 (LGA 2011).

Q: Does the i7-3930K support ECC memory?

A: No, ECC memory is not supported.

Q: How many PCIe lanes does the CPU provide?

A: It provides 40 PCIe Gen 3 lanes from the CPU itself.

Q: Is the multiplier unlocked?

A: Yes, the multiplier is unlocked, allowing overclocking.

Q: What was the launch MSRP of the i7-3930K?

A: The launch MSRP was $583.

Q: What memory type and channel configuration does it support?

A: It supports DDR3 memory in a quad-channel configuration, with a peak bandwidth of 51.2 GB/s.

Single-Thread vs Multi-Thread Behavior

The i7-3930K exhibits a pronounced split between its single-thread and multi-thread performance. In Cinebench R23, the single-core score of 984 is less than a quarter of the multi-core score of 6973, a ratio of roughly 7.1. The same pattern appears in R20 (413 single vs 2928 multi, ratio 7.1) and R15 (99 single vs 702 multi, ratio 7.1). Geekbench shows a lower ratio of 4.85 (617 single vs 2991 multi), but the trend is consistent: the chip scales well across its 12 threads, but each individual core is slow by modern standards. This is due to the modest 3.80 GHz boost clock and the aging Sandy Bridge architecture. For workloads that rely on a single thread, such as many legacy applications, spreadsheet macros, or some game engines, the 3930K will feel sluggish. The 46th percentile overall ranking is pulled down by these weak single-core numbers. In contrast, multi-threaded workloads like video rendering or physics simulations can still see good throughput because the six cores and twelve threads are fully utilized. The near-7x scaling indicates that the memory subsystem and thread scheduler are not major bottlenecks, but the absolute performance per thread is low. Therefore, any evaluation of this CPU must separate the two: it is a poor single-thread performer but a decent multi-thread worker for its age.

Platform and Compatibility

The i7-3930K is built for the LGA 2011 socket, a high-end desktop platform that was shared with Intel's Xeon E5 processors. It uses the Sandy Bridge-E architecture and the 32nm process node. Memory support is DDR3 with a quad-channel interface, delivering a theoretical bandwidth of 51.2 GB/s. The CPU provides 40 PCIe Gen 3 lanes, which is a generous amount for multi-GPU configurations or high-speed expansion cards. There is no integrated graphics, so a discrete GPU is mandatory. The chip's production status is end-of-life, meaning Intel no longer manufactures or supports it. Consequently, there is no forward upgrade path within the same socket; LGA 2011 boards will not accept any newer architectures. The part number is SR0GWSR0KY, and the release date was November 13, 2011. For builders, the platform's main advantages are the wide memory bus and the high PCIe lane count, which remain useful in workstation scenarios. The lack of ECC support and the absence of integrated graphics are notable limitations. Overall, the i7-3930K is a legacy part that can still be pressed into service for multi-threaded tasks on a used LGA 2011 board, but its platform is a dead end and its single-thread performance is a serious handicap for modern interactive workloads.